US6747186B2 - Water-decomposable absorbent article - Google Patents

Water-decomposable absorbent article Download PDF

Info

Publication number
US6747186B2
US6747186B2 US09/886,505 US88650501A US6747186B2 US 6747186 B2 US6747186 B2 US 6747186B2 US 88650501 A US88650501 A US 88650501A US 6747186 B2 US6747186 B2 US 6747186B2
Authority
US
United States
Prior art keywords
water
backsheet
decomposable
absorbent article
nonwoven fabric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09/886,505
Other languages
English (en)
Other versions
US20020013559A1 (en
Inventor
Jyoji Shimizu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unicharm Corp
Original Assignee
Unicharm Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unicharm Corp filed Critical Unicharm Corp
Assigned to UNI-CHARM CORPORATION reassignment UNI-CHARM CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SHIMIZU, JYOJI
Publication of US20020013559A1 publication Critical patent/US20020013559A1/en
Application granted granted Critical
Publication of US6747186B2 publication Critical patent/US6747186B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
    • A61F13/51401—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15203—Properties of the article, e.g. stiffness or absorbency
    • A61F13/15211—Properties of the article, e.g. stiffness or absorbency soluble or disintegratable in liquid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/28—Polysaccharides or their derivatives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
    • A61F13/51401—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material
    • A61F2013/51409—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a film
    • A61F2013/51433—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a film being biodegradable

Definitions

  • the present invention relates to an absorbent article for pantiliners, sanitary napkins, incontinence pads, diapers, etc., more particularly, to such an absorbent article having a water-decomposable backsheet.
  • the water-decomposable absorbent articles such as pantiliners and sanitary napkins have respectively an adhesive layer formed on the rear surface of the backsheet for fitting the absorbent article to an external support such as an undergarment. After used, the absorbent articles are peeled from external supports at the adhesive layer, and disposed of in flush toilets.
  • These water-decomposable absorbent articles are composed of constituent components (absorbent core, topsheet, backsheet, etc.) having increased decomposability in water.
  • the conventional water-decomposable components of such absorbent articles are generally problematic in that, when their decomposability in water is increased, the bonding strength of fibers constituting them tends to be inevitably lowered in wet and dry condition. Therefore, it is difficult to increase both the decomposability in water and the strength of the water-decomposable components of absorbent articles.
  • An object of the present invention is to provide an absorbent article of which the backsheet is decomposable in water and satisfies the two requirements of high decomposability in water and good surface strength enough for use.
  • an absorbent article may comprise a backsheet, a liquid-pervious topsheet and a water-decomposable absorbent core sandwiched between the backsheet and the topsheet, at least the backsheet being made from a water-decomposable material, wherein;
  • the backsheet is formed of a fibrous sheet that contains water-dispersible fibers and water-insoluble carboxymethyl cellulose, and
  • the water-insoluble carboxymethyl cellulose has a degree of etherification (D.S.) falling between 0.3 and 0.6, and is modified so that the hydrogens of at least 95% of carboxylic acids therein are substituted with metal.
  • D.S. degree of etherification
  • the backsheet is formed of a fibrous sheet of which the surface strength and the breaking strength in the direction of the thickness are both high. Therefore, the backsheet surely retains the shape thereof during being used. Furthermore, when the absorbent article is, after used, peeled from an external support at the adhesive layer formed on the rear surface of the backsheet, the backsheet is not separated from the adhesive layer so that the backsheet hardly remains on the external support fitting with the adhesive layer.
  • the breaking strength in the direction of the thickness of the backsheet is meant to indicate the breaking resistance of a fibrous sheet forming the backsheet in the direction of the thickness, when a tensile force is applied to the sheet in the vertically opposite directions so as to separate the front surface from the rear surface thereof.
  • the metal is at least one selected from the group consisting of calcium, sodium, magnesium, zinc, manganese, lithium, barium, and aluminium.
  • the basic weight of the fibrous sheet to form the backsheet falls, for example, between 10 and 50 g/m 2 .
  • the water-insoluble carboxymethyl cellulose accounts for from 1 to 30% by weight of the fibrous sheet to form the backsheet.
  • the fibrous sheet to form the backsheet is a water-decomposable nonwoven fabric having been subjected to water-jetting treatment, or it is water-decomposable paper.
  • the water-dispersible fibers are fibers of at least one selected from the group consisting of pulp, regenerated cellulose, abaca, and linter pulp.
  • the fibrous sheet to form the backsheet has a surface strength of at least 4 (in terms of wax number), measured according to JIS P8129-1976 2.1.
  • FIG. 1 is a perspective view of one embodiment of an absorbent article of the invention
  • FIG. 2 is a top view of the absorbent article of FIG. 1;
  • FIG. 3 is a cross-sectional view of the absorbent article of FIGS. 1 and 2, as taken along the line III—III;
  • FIG. 1 is a perspective view of one embodiment of an absorbent article of the invention, as viewed from a top surface thereof (i.e., a body facing surface that faces the skin of a wearer);
  • FIG. 2 is a top view of the absorbent article of FIG. 1;
  • FIG. 3 is a cross-sectional view of the absorbent article of FIGS. 1 and 2, as taken along the line III—III;
  • FIG. 4 is a bottom view of the absorbent article of FIGS. 1 and 2, as viewed from a back surface (i.e., a garment facing surface).
  • a longitudinal direction of the absorbent article is designated by Y
  • a transverse direction which is substantially perpendicular to the direction Y is designated by X.
  • an absorbent article 1 is for pantiliners or sanitary napkins.
  • an absorbent article 1 comprises a liquid-pervious topsheet 10 that faces the skin of a wearer; a backsheet 12 ; and an absorbent core 11 sandwiched between the topsheet 10 and the backsheet 12 .
  • the backsheet 12 is formed of a water-decomposable material of fibers that are dispersible when having received a large amount of water.
  • the topsheet 10 and the absorbent core 11 are not necessarily required to be formed of a water-decomposable material, but are preferably formed of natural fibers or a biodegradable material. More preferably, the topsheet 10 and the absorbent core 11 are also decomposable in water.
  • a thermoplastic resin layer 12 r is applied to the absorbent core side of the backsheet 12 .
  • the region having a predetermined width between a peripheral edge 1 e of the absorbent article 1 and a boundary 3 and extending along the periphery of the absorbent article 1 provides a peripheral region 1 b.
  • the boundary 3 is an inner edge of the peripheral region 1 b.
  • the peripheral region 1 b is partly or entirely round-sealed to form a round-sealed area 2 .
  • an adhesive layer 30 for fitting the absorbent article 1 to an external support while in use is formed on the rear side of the backsheet 12 .
  • the adhesive layer 30 is a pressure-sensitive adhesive layer, and the surface thereof is covered with a release sheet for protecting the adhesive layer before use.
  • the release sheet is peeled from the absorbent article 1 , and then the absorbent article 1 is fitted to a crotch part of the external support such as sanitary panties so that the adhesive layer 30 formed on the rear side of the absorbent article 1 is adhered and secured to the inner surface of the crotch part.
  • the water-dispersible fibers for use in the invention may be natural fibers and/or chemical fibers.
  • Natural fibers usable herein include fibers of wood pulp (e.g., hardwood pulp, softwood pulp), abaca, kenaf or linter pulp; and chemical fibers also usable herein include regenerated fibers of rayon or fibrillated rayon, synthetic fibers of polypropylene, polyvinyl alcohol, polyester or polyacrylonitrile, and biodegradable synthetic fibers such as polylactic acid fibers, etc.
  • biodegradable fibers such as natural fibers of pulp or kenaf, as well as rayon fibers or polylactic acid fibers. More preferred are natural fibers of pulp having a degree of beating of at most 700 cc, desirably at most 600 cc, as well as rayon fibers, as they are well dispersible in water.
  • the fiber length of the water-dispersible fibers is at most 20 mm in view of the decomposability in water of the fibrous sheet. More preferably, it falls between 2 and 10 mm. In case where the water-dispersible fibers are of rayon, it is desirable that the fineness thereof falls between 1.1 and 3.3 dtex.
  • the fibrous sheet for use in the invention comprises water-insoluble carboxymethyl cellulose that serves as a binder.
  • the water-insoluble carboxymethyl cellulose has a degree of etherification (D.S.) falling between 0.3 and 0.6.
  • D.S. degree of etherification
  • its pH is at least 5.0.
  • the water-insoluble carboxymethyl cellulose is a completely-substituted compound in which hydrogens of at least 95%, more preferably at least 99.0%, even more preferably at least 99.9% of carboxylic acids are substituted with metal.
  • the preferred water-insoluble carboxymethyl cellulose is represented by the following chemical formula, wherein M of at least 95% of the carboxylic acid group (surrounded by the dotted line) is a metal and M of smaller than 5% of the carboxylic acid group is hydrogen.
  • the water-insoluble carboxymethyl cellulose that serves as a binder is a completely-substituted (or substantially completely-substituted) compound. Accordingly, the hydrogen-bonding force (or the ester-bonding force) of the residual carboxylic acid (in which M of the carboxylic acid group is hydrogen) is lowered, and, as a result, the decomposability in water of the fibrous sheet is increased.
  • the water-insoluble carboxymethyl cellulose serves as a binder in the fibrous sheet in dry condition. Therefore, in comparison with a fibrous sheet not containing the water-insoluble carboxymethyl cellulose, the fibrous sheet for use in the invention has an increased surface strength and an increased breaking strength in the direction of the thickness.
  • the backsheet 12 made of this fibrous sheet has received a large amount of water, the water-insoluble carboxymethyl cellulose therein swells to cause strength reduction (i.e., lower the strength-retaining ability) of the fibrous sheet, so that the fibrous sheet is readily degraded even by a little force (of water streams).
  • the decomposability in water of the fibrous sheet referred to herein is equal to the dispersibility in water thereof, and it means that, when the fibrous sheet has received a large amount of water, the fibers constituting the fibrous sheet are separately dispersed in water and, as a result, the fibrous sheet falls into small pieces therein.
  • the blend ratio of the water-insoluble carboxymethyl cellulose therein preferably falls between 1 and 30% by weight, more preferably between 3 and 10% by weight. If the blend ratio of the water-insoluble carboxymethyl cellulose therein is larger than 30% by weight, the decomposability in water of the fibrous sheet will be low, and the texture thereof will be degraded.
  • the basic weight (Metsuke) of the fibrous sheet falls between 10 and 50 g/m 2 . If it is smaller than the lowermost limit of the defined range, the backsheet made of the fibrous sheet could not have enough strength. On the other hand, if it is larger than the uppermost limit thereof, the fibrous sheet will lose a soft feel. More preferably, the basic weight of the fibrous sheet falls between 15 and 35 g/m 2 .
  • the fibrous sheet for use in the invention may be made from the above-mentioned water-dispersible fibers and water-insoluble carboxymethyl cellulose in various production methods.
  • water-dispersible fibers and water-insoluble carboxymethyl cellulose are mixed and made into a fibrous web according to a paper-making process to be formed into a water-decomposable paper.
  • water-dispersible fibers and water-insoluble carboxymethyl cellulose are mixed and made into a fibrous web, and then the resulting fibrous web is processed with water jets to be into a water-decomposable nonwoven fabric.
  • the backsheet 12 is made of the fibrous sheet having been subjected to such water-jetting treatment, it is bulky and will have a smooth feel.
  • the thickness of the fibrous sheet could be, for example, 0.1 mm or more.
  • the adhesive layer 30 can be firmly bonded to a rough surface of the nonwoven fabric owing to the anchor effect thereof. Accordingly, when the absorbent article is, after used, removed from the external support, the adhesive layer 30 can be readily released from the surface of the external support with keeping firm bonding to the backsheet 12 , thereby hardly remaining on the surface of the external support.
  • water-insoluble carboxymethyl cellulose of a completely-substituted type is used as a binder in the fibrous sheet. Therefore, when the fibrous sheet is, after made according to a paper-making process or after processed with water jets, heated and dried to remove water therefrom, its decomposability in water is not degraded under heat in the drying treatment.
  • the water-jetting treatment to be applied to the fibrous web to obtain fibrous sheet for use herein will be described in detail.
  • the fibrous web is put on a mesh conveyor belt sequentially feeding the fibrous web, and high-pressure water jets are applied thereto so as to pass through the fibrous web from the top surface to the back surface thereof.
  • the properties of the nonwoven fabric obtained is to vary, depending on the basic weight of the fibrous web to be processed, the orifice size of the jetting nozzle to be used, the number of orifices of the nozzle, the processing speed of the fibrous web, and the like.
  • fibrous webs are subjected to water-jetting treatment, of which the work function (work load) represented by the following equation falls between 0.04 and 0.5 (kW/m 2 ) in one pass for one side surface of one fibrous web, once or repeatedly up to 6 times to obtain preferable nonwoven fabrics.
  • work function work load
  • the equation for deriving the work function is as follows:
  • the fibers constituting the fibrous web will be too much entangled during the treatment, and, as a result, the decomposability in water of the fibrous sheet produced may be degraded or the fibrous web being processed may be broken.
  • the work function is smaller than the lowermost limit of the defined range, the fibrous sheet produced could not have the desired strength.
  • the fibrous sheet in dry has a breaking strength of at least 9.8 N/25 mm relative to the tensile load applied thereto in the direction of sheet surface (in a horizontal direction of the sheet).
  • the fibrous sheet has a breaking strength of at least 1.5 N/18 mm in the direction of the thickness (in a vertical direction of the sheet).
  • the decomposability in water of the fibrous sheet in wet is at most 120 seconds measured according to JIS P4501.
  • the fibrous sheet may contain any other compounds.
  • it may contain colorant, surfactant, microbicide, preservative, deodorizer, moisturizer, alcohol, etc.
  • the fibrous sheet may contain any other binder in addition to water-insoluble carboxymethyl cellulose in order to increase the strength thereof.
  • the additional binder includes, for example, polyvinyl alcohol, modified polyvinyl alcohols such as carboxylic acid-modified polyvinyl alcohol and sulfonic acid-modified polyvinyl alcohol, alkyl celluloses such as methyl cellulose, as well as starch, modified starch, sodium polyacrylate, sodium alginate, polyethyleneoxide, etc.
  • the rear surface (the garment facing surface) of the backsheet 12 may be coated with a water-soluble resin such as polyvinyl alcohol or a copolymer comprising an unsaturated carboxylic acid to make the backsheet impervious to liquid.
  • a water-soluble resin such as polyvinyl alcohol or a copolymer comprising an unsaturated carboxylic acid to make the backsheet impervious to liquid.
  • the adhesive layer 30 is formed on the rear side of the absorbent article 1 .
  • the adhesive layer 30 is formed on the entire surface of the rear surface (the garment facing surface) of the backsheet 12 in a polka dot-pattern in which a number of dots are spotwise formed.
  • the respective dots are substantially circular, preferably having a diameter of from 1 mm to 10 mm.
  • the number of the dots are spaced from each other at an interval in both the longitudinal direction (direction Y) and the transverse direction (direction X) on the rear surface of the backsheet 12 .
  • the dots of the adhesive layer 30 are aligned regularly in both the longitudinal direction and the transverse direction.
  • the dots are substantially formed in the entire region of the rear surface of the backsheet 12 .
  • the pattern of the adhesive layer 30 is not limited to the dots as illustrated, but may form stripes or rectangles regularly aligned in both the longitudinal direction and the transverse direction.
  • the area ratio of the dots of the adhesive layer 30 accounts for from 10 to 50% or so relative to the total area of the back of the backsheet 12 .
  • the adhesive to form the adhesive layer 30 may be any and every one generally used as securing means for fitting the absorbent articles to the external supports. Especially preferred for it is a water-swellable adhesive of an acrylic or aqueous emulsion comprising a hydrophilic protective colloid, or polyvinyl alcohol.
  • thermoplastic resin layer 12 r formed on the absorbent core side of the backsheet 12 is, for example, a water-soluble or water-swellable polyvinyl alcohol film, and this is laminated on the backsheet 12 .
  • the adhesives 13 a and 13 b provided in the intermediate region 1 a are soluble or swellable in water, for which, for example, used is a hot-melt adhesive of polyvinyl alcohol.
  • the absorbent core 11 is made of, for example, water-decomposable paper, pulp or nonwoven fabric.
  • air-laid pulp is formed into the absorbent core 11 , having a basic weight of from 50 to 70 g/m 2 or so.
  • the absorbent core 11 is formed of water-decomposable paper, it is desirable that a plurality of relatively thin water-decomposable papers are laminated to form it, as the absorbent core 11 thus formed is well decomposable in water.
  • from 4 to 8 sheets or so of water-decomposable paper having a basic weight of from 10 to 20 g/m 2 are laminated to form the absorbent core 11 .
  • the water-decomposable paper to be laminated to form the absorbent core may be coated with a water-swellable resin such as polyvinyl alcohol.
  • the water-decomposable absorbent article of the invention is described hereinabove with reference to one embodiment of pantiliners or sanitary napkins, to which, however, the invention is not limited. Needless to say, the absorbent article of the invention is applicable to any others such as disposable diapers and incontinence pads.
  • fibrous sheets to form the backsheet of the absorbent article of the invention were produced and tested for their physical properties.
  • each sample was cut to have a length of 10 cm and a width of 10 cm, put into a beaker filled with 300 ml of ion-exchanged water, and stirred therein with a stirrer.
  • the revolution speed of the stirrer was 600 rpm. While stirred, the condition of the sample being dispersed in water was macroscopically observed at predetermined time intervals, and the time until the sample was dispersed was measured. In Table 1, the time is in terms of seconds.
  • Each sample was cut to have a width of 25 mm and a length of 150 mm. These were tested by use of a Tensilon tester, for which chuck-to-chuck distance was 100 mm and the stress rate was 100 mm/min. The dry strength of the sample was measured both in the longitudinal direction (MD: machine direction) and in the transverse direction (CD: cross direction) thereof. In Table 1, the data are in terms of N/25 mm.
  • the surface strength of each sample was measured.
  • Table 1 the data are in terms of the number of wax.
  • the waxes such as Dennison wax were fused to the surface of each sample. Sequentially increasing numbers were previously applied to the respective waxes depending on their adhesiveness. After fusion, the waxes were left to stand for cooling, and then peeled from the surface of the sample promptly. The largest number of the wax which caused no damage such as breakage on the surface of the sample was recorded as surface strength of the sample.
  • An polyester adhesive tape (“No. 31B75-HAI” manufactured by Nitto Denko Corporation) having a size of 18 mm ⁇ 15 mm was attached onto both surfaces of the sample to be tested.
  • a one-kg roller was rolled on one tape surface of the sample at a speed of 5 m/min to apply load for securing the two tapes onto the sample.
  • the two tapes were vertically peeled away from each other at a stress rate of 100 mm/min, and the tensile strength at which the sample was separated (broken) in the direction of the thickness (specifically, in the vertically opposite directions) was measured.
  • pantiliners as shown in FIGS. 1 to 4 were produced, in which the backsheet 12 was made of the fibrous sheet of Examples 1 and 3.
  • the pantiliners had a length of 140 mm and a width of 55 mm.
  • the topsheet 10 was made of a wet spun-laced nonwoven fabric having a basic weight of 45 g/m 2
  • the absorbent core 11 was made of air-laid pulp having a basic weight of 60 g/m 2 .
  • An acrylic emulsion was used as an adhesive layer for fitting the pantiliner to an undergarment, and applied in polka-dot pattern.
  • the data are in terms of %.
  • the data are in terms of %.
  • Example 1 Example 2
  • Example 3 Comp. Ex. 1 Comp. Ex. 2 NBKP (beaten) 90 92 85 80
  • Thickness mm 0.120 0.118 0.122 0.125 0.116 Decomposability in water Sec 65 55 105 30 300 or more Dry strength (MD) N/25 mm 20.7 17.2 35.5 18.8 18.5 Dry strength (CD) N/25 mm 15.6 12.3 18.8 13.9
  • 14.1 Surface strength wax number 6 5 8 2 2 2 Breaking strength in N/18 mm 2.1 1.8 3.8 1.2 3.0 thickness direction Wear test (for adhesive % 0 — 0 70 60 transfer) Wear test (for backsheet % 0 — 0 20 10 breakage)
  • the backsheet of the water-decomposable absorbent article of the invention is well decomposable in water and has high surface strength and high breaking strength in the direction of the thickness. Therefore, while used, the absorbent article well retain the shape thereof and is highly durable. Furthermore, when the absorbent article is fitted to an external support via the adhesive layer formed on the rear side of the backsheet and after used, it is peeled from the external support, the backsheet is hardly separated from the body of the absorbent article to avoid remaining on the external support.
  • the absorbent article having been fitted to an external support can be smoothly peeled from the external support without leaving the adhesive layer on the external support.
  • the adhesive layer can be well peeled from the external support in the condition of still firmly bonding to the backsheet.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Biomedical Technology (AREA)
  • Dermatology (AREA)
  • Hematology (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Laminated Bodies (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
US09/886,505 2000-06-28 2001-06-21 Water-decomposable absorbent article Expired - Fee Related US6747186B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2000193813 2000-06-28
JP2000-193813 2000-06-28
JP2001135784A JP2002078733A (ja) 2000-06-28 2001-05-07 吸収性物品
JP2001-135784 2001-05-07

Publications (2)

Publication Number Publication Date
US20020013559A1 US20020013559A1 (en) 2002-01-31
US6747186B2 true US6747186B2 (en) 2004-06-08

Family

ID=26594827

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/886,505 Expired - Fee Related US6747186B2 (en) 2000-06-28 2001-06-21 Water-decomposable absorbent article

Country Status (17)

Country Link
US (1) US6747186B2 (id)
EP (1) EP1166803B1 (id)
JP (1) JP2002078733A (id)
KR (1) KR100787069B1 (id)
CN (1) CN1179714C (id)
AT (1) ATE397944T1 (id)
AU (1) AU778346B2 (id)
BR (1) BR0102619B1 (id)
CA (1) CA2351252C (id)
DE (1) DE60134364D1 (id)
DK (1) DK1166803T3 (id)
ES (1) ES2306691T3 (id)
ID (1) ID30600A (id)
MY (1) MY129077A (id)
PT (1) PT1166803E (id)
SG (1) SG99906A1 (id)
TW (1) TW509563B (id)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030099821A1 (en) * 2001-10-15 2003-05-29 Uni-Charm Corporation Water-disintegratable sheet and manufacturing method thereof
US20080147034A1 (en) * 2006-12-15 2008-06-19 Wang James H Water-sensitive biodegradable film
US20090054548A1 (en) * 2007-08-22 2009-02-26 Kimberly-Clark Worldwide, Inc. Biodegradable water-sensitive films
US20110144607A1 (en) * 2008-04-30 2011-06-16 Nahomi Suzuki Absorbent article and method of manufacturing absorbent article
US20110152814A1 (en) * 2007-09-19 2011-06-23 Senevens International Ltd. Non-woven biodegradable hygiene product
US20110184363A1 (en) * 2008-06-24 2011-07-28 Unicharm Corporation Absorbent article and method of manufacturing the absorbent article
US20110319846A1 (en) * 2010-06-25 2011-12-29 The Procter & Gamble Company Disposable Diapers
US20120220973A1 (en) * 2011-02-28 2012-08-30 Jennifer Wing-Yee Chan Adhesive bandage
US20120265161A1 (en) * 2008-07-08 2012-10-18 Banks John M Flushable body fluid absorbent composite
US8907155B2 (en) 2010-11-19 2014-12-09 Kimberly-Clark Worldwide, Inc. Biodegradable and flushable multi-layered film
USD745689S1 (en) 2011-02-28 2015-12-15 Johnson & Johnson Consumer Inc. Adhesive bandage with decorated pad
USD745688S1 (en) 2011-02-28 2015-12-15 Johnson & Johnson Consumer Inc. Adhesive bandage with decorated pad
US9327438B2 (en) 2011-12-20 2016-05-03 Kimberly-Clark Worldwide, Inc. Method for forming a thermoplastic composition that contains a plasticized starch polymer
US20170095375A1 (en) * 2014-03-21 2017-04-06 Fan Wu Sanitary absorbing construction
US9718258B2 (en) 2011-12-20 2017-08-01 Kimberly-Clark Worldwide, Inc. Multi-layered film containing a biopolymer
USD913507S1 (en) 2018-12-10 2021-03-16 Johnson & Johnson Consumer Inc. Adhesive bandage with decorated pad
USD918398S1 (en) 2018-12-10 2021-05-04 Johnson & Johnson Consumer Inc. Adhesive bandage with decorated pad
US11840797B1 (en) 2014-11-26 2023-12-12 Microban Products Company Textile formulation and product with odor control

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3792147B2 (ja) * 2001-10-15 2006-07-05 ユニ・チャーム株式会社 水解性シートおよびその製造方法
KR101013925B1 (ko) * 2002-09-17 2011-02-14 유니챰 가부시키가이샤 음순간 제품 및 이 음순간 제품용의 수붕괴성 표면측 시트
JP2004261230A (ja) 2003-02-18 2004-09-24 Uni Charm Corp 水洗可能な陰唇間パッド
JP4212953B2 (ja) * 2003-05-23 2009-01-21 ユニ・チャーム株式会社 水解性の吸収性物品
TWI347181B (en) * 2004-03-23 2011-08-21 Kao Corp Absorbent article
JP5726128B2 (ja) * 2012-05-09 2015-05-27 ユニ・チャーム株式会社 吸収性物品
JP5983202B2 (ja) * 2012-09-03 2016-08-31 王子ホールディングス株式会社 吸収シート及びその製造方法
JP5983353B2 (ja) * 2012-11-26 2016-08-31 王子ホールディングス株式会社 吸収シート及びその製造方法
CN103041437A (zh) * 2012-12-25 2013-04-17 武汉纺织大学 一种高强度、高吸水性含羧甲基纤维素医用敷料及其制备方法
US20170224540A1 (en) * 2014-08-08 2017-08-10 LMNF Inc. Biodegradable, biobased diaper
JP6320284B2 (ja) * 2014-12-12 2018-05-09 ユニ・チャーム株式会社 水解性吸収体及び吸収性物品
EP3034055B1 (en) * 2014-12-15 2019-08-07 The Procter and Gamble Company Absorbent articles with thinner backsheet
US10709806B2 (en) 2015-07-22 2020-07-14 Everyone's Earth Inc. Biodegradable absorbent articles
JP6135799B2 (ja) * 2016-05-20 2017-05-31 王子ホールディングス株式会社 吸収シート及びその製造方法
JP6237823B2 (ja) * 2016-05-20 2017-11-29 王子ホールディングス株式会社 吸収シート及びその製造方法
GB201709925D0 (en) 2017-06-21 2017-08-02 Royal College Of Art Composite structure
KR102165387B1 (ko) * 2020-05-21 2020-10-14 주식회사 엔바이오니아 메디컬 진단키트용 흡습패드 및 그 제조방법
CN111705508A (zh) * 2020-07-02 2020-09-25 北京健翔嘉业日用品有限责任公司 一种卫生巾用抗菌椰脂纤维及其制备方法与应用

Citations (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639239A (en) * 1950-11-18 1953-05-19 Hercules Powder Co Ltd Heat-treated alkali-metal carboxymethyl cellulose and process of preparing it
US3563241A (en) * 1968-11-14 1971-02-16 Du Pont Water-dispersible nonwoven fabric
US3589364A (en) * 1968-03-14 1971-06-29 Buckeye Cellulose Corp Bibulous cellulosic fibers
US3618607A (en) * 1970-02-17 1971-11-09 Johnson & Johnson Saline fluid absorption and retention tampons and methods of making the same
US3665923A (en) * 1970-02-05 1972-05-30 Kimberly Clark Co Flushable sanitary napkin
US3723413A (en) * 1970-10-26 1973-03-27 Personal Products Co Water-insoluble fluid-absorptive and retentive materials and methods of making the same
US3731686A (en) * 1971-03-22 1973-05-08 Personal Products Co Fluid absorption and retention products and methods of making the same
US3756232A (en) * 1969-11-12 1973-09-04 K Noguchi Sanitary napkins disposable in water closet bowl with the use of alkaline agent
US3858585A (en) * 1971-03-22 1975-01-07 Personal Products Co Fluid absorption and retention products and methods of making the same
US3965091A (en) * 1973-11-22 1976-06-22 Hoechst Aktiengesellschaft Process for the production of water-adsorbing but water-insoluble cellulose ethers
US4090013A (en) * 1975-03-07 1978-05-16 National Starch And Chemical Corp. Absorbent composition of matter
US4187342A (en) * 1977-03-12 1980-02-05 Hoechst Aktiengesellschaft Bonded fiber web, which is capable of absorbing water vapor comprising a swellable cellulose ether in fiber form
US4200557A (en) * 1973-12-07 1980-04-29 Personal Products Company Absorbent product including grafted insolubilized cellulose ether
US4340731A (en) * 1979-06-20 1982-07-20 Montedison S.P.A. Polycarboxyalkyl-cellulose having high fluid absorbing and retaining properties, and process for preparing same
US4357938A (en) * 1980-08-07 1982-11-09 Kao Soap Co., Ltd. Disposable diaper
USRE31323E (en) * 1978-05-17 1983-07-26 International Playtex, Inc. Preparation of water-insoluble carboxymethyl cellulose absorbents
US4401813A (en) * 1981-12-10 1983-08-30 Nl Industries, Inc. Process for preparing alkali metal salt of carboxymethyl cellulose
US4650716A (en) * 1985-05-14 1987-03-17 Hercules Incorporated Novel salts of carboxymethylcellulose
US4664105A (en) * 1981-09-30 1987-05-12 Veb Leipziger Arzneimittelwerk Absorbing wound dressing and method for making the same
US4710184A (en) * 1983-03-23 1987-12-01 Beghin-Say S.A. Absorbing material containing an isothiazoline-one-3 derivative, application to personal hygiene and process for manufacturing this material
US4940785A (en) * 1987-10-03 1990-07-10 Degussa Aktiengesellschaft Method of preparing cellulose ethers containing tertiary or quaternary nitrogen
JPH038897A (ja) 1989-03-25 1991-01-16 Lion Corp 水解性・吸収性シート状体およびその製造方法
JPH03167400A (ja) 1989-11-27 1991-07-19 Nichirin Kagaku Kogyo Kk 水解性紙
US5300358A (en) * 1992-11-24 1994-04-05 E. I. Du Pont De Nemours And Co. Degradable absorbant structures
JPH06192991A (ja) 1992-10-29 1994-07-12 Nichirin Kagaku Kogyo Kk 水分散性シートの製造方法
JPH0819571A (ja) 1994-07-07 1996-01-23 Unitika Ltd 吸収性衛生用品
JPH0838547A (ja) 1994-05-27 1996-02-13 Unitika Ltd 吸収性衛生用品
US5676964A (en) * 1988-05-13 1997-10-14 Fidia, S.P.A. Crosslinked carboxy polysaccharides
EP0802282A1 (en) 1995-11-02 1997-10-22 Uni-Charm Company Limited Process for preparing hydrolyzable sheet
US5731083A (en) * 1991-12-09 1998-03-24 Courtaulds Plc Cellulosic fibres
US5801116A (en) * 1995-04-07 1998-09-01 Rhodia Inc. Process for producing polysaccharides and their use as absorbent materials
EP0900878A2 (en) 1997-09-08 1999-03-10 Uni-Charm Corporation Water-disintegrable fibrous sheet
JP3008897B2 (ja) 1997-07-14 2000-02-14 日本電気株式会社 有機エレクトロルミネッセンス素子
JP3167400B2 (ja) 1992-01-31 2001-05-21 株式会社三共 弾球遊技機の可変入賞球装置
US6432095B1 (en) * 1999-11-19 2002-08-13 Uni-Charm Corporation Water-decomposable absorbent article
US6433245B1 (en) * 1997-11-25 2002-08-13 The Procter & Gamble Company Flushable fibrous structures

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU7388496A (en) * 1995-11-22 1997-06-11 Procter & Gamble Company, The Water dispersible and flushable absorbent article

Patent Citations (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639239A (en) * 1950-11-18 1953-05-19 Hercules Powder Co Ltd Heat-treated alkali-metal carboxymethyl cellulose and process of preparing it
US3589364A (en) * 1968-03-14 1971-06-29 Buckeye Cellulose Corp Bibulous cellulosic fibers
US3563241A (en) * 1968-11-14 1971-02-16 Du Pont Water-dispersible nonwoven fabric
US3756232A (en) * 1969-11-12 1973-09-04 K Noguchi Sanitary napkins disposable in water closet bowl with the use of alkaline agent
US3665923A (en) * 1970-02-05 1972-05-30 Kimberly Clark Co Flushable sanitary napkin
US3618607A (en) * 1970-02-17 1971-11-09 Johnson & Johnson Saline fluid absorption and retention tampons and methods of making the same
US3723413A (en) * 1970-10-26 1973-03-27 Personal Products Co Water-insoluble fluid-absorptive and retentive materials and methods of making the same
US3858585A (en) * 1971-03-22 1975-01-07 Personal Products Co Fluid absorption and retention products and methods of making the same
US3731686A (en) * 1971-03-22 1973-05-08 Personal Products Co Fluid absorption and retention products and methods of making the same
US3965091A (en) * 1973-11-22 1976-06-22 Hoechst Aktiengesellschaft Process for the production of water-adsorbing but water-insoluble cellulose ethers
US4200557A (en) * 1973-12-07 1980-04-29 Personal Products Company Absorbent product including grafted insolubilized cellulose ether
US4090013A (en) * 1975-03-07 1978-05-16 National Starch And Chemical Corp. Absorbent composition of matter
US4187342A (en) * 1977-03-12 1980-02-05 Hoechst Aktiengesellschaft Bonded fiber web, which is capable of absorbing water vapor comprising a swellable cellulose ether in fiber form
USRE31323E (en) * 1978-05-17 1983-07-26 International Playtex, Inc. Preparation of water-insoluble carboxymethyl cellulose absorbents
US4340731A (en) * 1979-06-20 1982-07-20 Montedison S.P.A. Polycarboxyalkyl-cellulose having high fluid absorbing and retaining properties, and process for preparing same
US4357938A (en) * 1980-08-07 1982-11-09 Kao Soap Co., Ltd. Disposable diaper
US4664105A (en) * 1981-09-30 1987-05-12 Veb Leipziger Arzneimittelwerk Absorbing wound dressing and method for making the same
US4401813A (en) * 1981-12-10 1983-08-30 Nl Industries, Inc. Process for preparing alkali metal salt of carboxymethyl cellulose
US4710184A (en) * 1983-03-23 1987-12-01 Beghin-Say S.A. Absorbing material containing an isothiazoline-one-3 derivative, application to personal hygiene and process for manufacturing this material
US4650716A (en) * 1985-05-14 1987-03-17 Hercules Incorporated Novel salts of carboxymethylcellulose
US4940785A (en) * 1987-10-03 1990-07-10 Degussa Aktiengesellschaft Method of preparing cellulose ethers containing tertiary or quaternary nitrogen
US5676964A (en) * 1988-05-13 1997-10-14 Fidia, S.P.A. Crosslinked carboxy polysaccharides
JPH038897A (ja) 1989-03-25 1991-01-16 Lion Corp 水解性・吸収性シート状体およびその製造方法
JPH03167400A (ja) 1989-11-27 1991-07-19 Nichirin Kagaku Kogyo Kk 水解性紙
US5731083A (en) * 1991-12-09 1998-03-24 Courtaulds Plc Cellulosic fibres
JP3167400B2 (ja) 1992-01-31 2001-05-21 株式会社三共 弾球遊技機の可変入賞球装置
JPH06192991A (ja) 1992-10-29 1994-07-12 Nichirin Kagaku Kogyo Kk 水分散性シートの製造方法
US5300358A (en) * 1992-11-24 1994-04-05 E. I. Du Pont De Nemours And Co. Degradable absorbant structures
JPH0838547A (ja) 1994-05-27 1996-02-13 Unitika Ltd 吸収性衛生用品
JPH0819571A (ja) 1994-07-07 1996-01-23 Unitika Ltd 吸収性衛生用品
US5801116A (en) * 1995-04-07 1998-09-01 Rhodia Inc. Process for producing polysaccharides and their use as absorbent materials
EP0802282A1 (en) 1995-11-02 1997-10-22 Uni-Charm Company Limited Process for preparing hydrolyzable sheet
JP3008897B2 (ja) 1997-07-14 2000-02-14 日本電気株式会社 有機エレクトロルミネッセンス素子
EP0900878A2 (en) 1997-09-08 1999-03-10 Uni-Charm Corporation Water-disintegrable fibrous sheet
US6433245B1 (en) * 1997-11-25 2002-08-13 The Procter & Gamble Company Flushable fibrous structures
US6432095B1 (en) * 1999-11-19 2002-08-13 Uni-Charm Corporation Water-decomposable absorbent article

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030099821A1 (en) * 2001-10-15 2003-05-29 Uni-Charm Corporation Water-disintegratable sheet and manufacturing method thereof
US7250382B2 (en) * 2001-10-15 2007-07-31 Uni-Charm Corporation Water-disintegratable sheet and manufacturing method thereof
US20080147034A1 (en) * 2006-12-15 2008-06-19 Wang James H Water-sensitive biodegradable film
US9056967B2 (en) 2006-12-15 2015-06-16 Kimberly-Clark Worldwide, Inc. Water-sensitive biodegradable film
US8592641B2 (en) 2006-12-15 2013-11-26 Kimberly-Clark Worldwide, Inc. Water-sensitive biodegradable film
US20090054548A1 (en) * 2007-08-22 2009-02-26 Kimberly-Clark Worldwide, Inc. Biodegradable water-sensitive films
US8598404B2 (en) 2007-08-22 2013-12-03 Kimberly-Clark Worldwide, Inc. Biodegradable water-sensitive films
US8329977B2 (en) 2007-08-22 2012-12-11 Kimberly-Clark Worldwide, Inc. Biodegradable water-sensitive films
US20110152814A1 (en) * 2007-09-19 2011-06-23 Senevens International Ltd. Non-woven biodegradable hygiene product
US20110144607A1 (en) * 2008-04-30 2011-06-16 Nahomi Suzuki Absorbent article and method of manufacturing absorbent article
US8791317B2 (en) * 2008-04-30 2014-07-29 Unicharm Corporation Absorbent article and method of manufacturing absorbent article
US20110184363A1 (en) * 2008-06-24 2011-07-28 Unicharm Corporation Absorbent article and method of manufacturing the absorbent article
US8502011B2 (en) * 2008-06-24 2013-08-06 Unicharm Corporation Absorbent article and method of manufacturing the absorbent article
US20120265161A1 (en) * 2008-07-08 2012-10-18 Banks John M Flushable body fluid absorbent composite
US8530722B2 (en) * 2010-06-25 2013-09-10 The Procter & Gamble Company Disposable diaper having nonwoven topsheet with particular combination of basis weight and bonding configuration
US20110319846A1 (en) * 2010-06-25 2011-12-29 The Procter & Gamble Company Disposable Diapers
US9211218B2 (en) 2010-06-25 2015-12-15 The Procter & Gamble Company Disposable diapers
US8907155B2 (en) 2010-11-19 2014-12-09 Kimberly-Clark Worldwide, Inc. Biodegradable and flushable multi-layered film
US20120220973A1 (en) * 2011-02-28 2012-08-30 Jennifer Wing-Yee Chan Adhesive bandage
USD745689S1 (en) 2011-02-28 2015-12-15 Johnson & Johnson Consumer Inc. Adhesive bandage with decorated pad
USD745688S1 (en) 2011-02-28 2015-12-15 Johnson & Johnson Consumer Inc. Adhesive bandage with decorated pad
US9327438B2 (en) 2011-12-20 2016-05-03 Kimberly-Clark Worldwide, Inc. Method for forming a thermoplastic composition that contains a plasticized starch polymer
US9718258B2 (en) 2011-12-20 2017-08-01 Kimberly-Clark Worldwide, Inc. Multi-layered film containing a biopolymer
US20170095375A1 (en) * 2014-03-21 2017-04-06 Fan Wu Sanitary absorbing construction
US11840797B1 (en) 2014-11-26 2023-12-12 Microban Products Company Textile formulation and product with odor control
USD913507S1 (en) 2018-12-10 2021-03-16 Johnson & Johnson Consumer Inc. Adhesive bandage with decorated pad
USD918398S1 (en) 2018-12-10 2021-05-04 Johnson & Johnson Consumer Inc. Adhesive bandage with decorated pad

Also Published As

Publication number Publication date
CN1179714C (zh) 2004-12-15
KR20020001644A (ko) 2002-01-09
SG99906A1 (en) 2003-11-27
TW509563B (en) 2002-11-11
PT1166803E (pt) 2008-07-07
ID30600A (id) 2002-01-03
ES2306691T3 (es) 2008-11-16
CA2351252A1 (en) 2001-12-28
MY129077A (en) 2007-03-30
DK1166803T3 (da) 2008-08-04
BR0102619A (pt) 2002-02-13
EP1166803A3 (en) 2003-07-16
EP1166803B1 (en) 2008-06-11
EP1166803A2 (en) 2002-01-02
CN1333010A (zh) 2002-01-30
AU5407101A (en) 2002-01-03
CA2351252C (en) 2008-04-08
DE60134364D1 (de) 2008-07-24
JP2002078733A (ja) 2002-03-19
BR0102619B1 (pt) 2010-11-16
KR100787069B1 (ko) 2007-12-21
ATE397944T1 (de) 2008-07-15
AU778346B2 (en) 2004-12-02
US20020013559A1 (en) 2002-01-31

Similar Documents

Publication Publication Date Title
US6747186B2 (en) Water-decomposable absorbent article
US6593510B2 (en) Water-decomposable absorbent article
US6642428B1 (en) Water-decomposable absorbent article
EP1118314B1 (en) Water-decomposable absorbent article
US6432095B1 (en) Water-decomposable absorbent article
WO2014073376A1 (ja) 吸収性物品
JP3938285B2 (ja) 吸収性物品
JP4566108B2 (ja) 吸収性物品

Legal Events

Date Code Title Description
AS Assignment

Owner name: UNI-CHARM CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SHIMIZU, JYOJI;REEL/FRAME:011929/0050

Effective date: 20010514

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20160608